interface SpeakHello{
  void speak();
}
class HelloMachine {
  public void turnOn(SpeakHello hello) {
    hello.speak();
  }
}
public class Example7_3 {
  public static void main (String args[]) {
    HelloMachine machine = new HelloMachine();
    machine.turnOn(new SpeakHello(){
      public void speak(){
        System.out.println("hello,you are welcome");
      }
    }
    );
    machine.turnOn(new SpeakHello() {
      public void speak() {
        System.out.println("您好，欢饮光临！");
      }
    }
    );
    }
  }
